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Find Generator install pros in Greenwich

Avatar for Frank's Generator Sales Service & Repair
Frank's Generator Sales Service & Repair
5.0(
21
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+4 more

Serving Greenwich, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"10 yr old Generac GP6500E wouldn’t start. Called around and many want to upsell to permanent. Found Franks and what a delight. Honest, down to earth, affordable for senior. Showed up on time. Changed oil, spark plug. Pulled carburetor and found it dirty and fouled. Got used one from his shop(same day) and installed. Gen started right up on one or two pulls. Battery was dead but showed us how to replace. Highly recommend Frank’s Generator."
Generator emergency service call
Generator Project
Generator Service
Generator emergency service call
Generator Project

+29

Response time2 days
Response rate98%
20 neighbors recently requested a quote
Avatar for Blue Wave Electric, LLC
Blue Wave Electric, LLC
5.0(
13
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Greenwich, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Credit card accepted

"This company is top notch! They came out quickly installed a number of fixtures that were difficult, and repairs two outlets which were complex. They worked fast, explained everything in detail, were kind, polite and efficient. I will never go to another election! These guys are real pros!"
Response time9 hrs
Response rate95%
5 neighbors recently requested a quote
Avatar for MB Electric
MB Electric
4.9(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Greenwich, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"MB Industries, LLC did a masterful job on my project. The owner, Matt, was on-time, personable, polite, professional, and skilled. He was meticulous in getting the job done right?not just ?good enough.? I will reach out to MB Industries LLC in the future. Thanks again Matt. 5 stars for sure!"
MB Industries
MB Industries
MB Industries
MB Industries
MB Industries

+46

Response time8 hrs
SmithPros
4.0(
16
)
Portable Generator - Repair

Serving Greenwich, CT and surrounding areas

Approved

Customers say: Quality work

"Artique Constructions did an amazing job with my bathroom and kitchen remodeling. Can not recommend enough for their quality of work and commitment to deliver to perfection. I chose very modern high end designs and their work was impeccable. I would have spent more than double if I had gone for anyone else. I got complete remodeling of kitchen(floor/cabinets/island/pantry/installation of all kitchen appliances/backsplash/open shelves/led ceiling lights) bathroom(bathtub/vanity/floor/bath tiles/built-in shelves/toilet), changed all switches and electric boxes, trims throughout the house, paint, door knobs, hinges, custom wall paneling. Garry made the house look like a million bucks houses featured in magazine. He is very trustworthy and patient. His attention to detail is amazing. Would suggest anyone who wants to get their house in amazing shape with no hidden costs Garry is the person to go to."
Recommended by61%of homeowners
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Generator Install questions, answered by experts

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

The Greenwich, CT homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.